package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import io.swagger.util.Json;
import lombok.extern.slf4j.Slf4j;
import org.apache.http.impl.client.HttpClients;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
@Slf4j
public class UserServiceImpl implements UserService {

    //微信服务接口地址
    public static final String WX_LOGIN="https://api.weixin.qq.com/sns/jscode2session";
    @Autowired
    private WeChatProperties weChatProperties;
    @Autowired
   private UserMapper userMapper;

    //微信登录
    @Override
    public User wxLogin(UserLoginDTO userLoginDTO) {
        //调佣微信接口服务,获得当前微信用户的openid
        String openid = getOpenid(userLoginDTO.getCode());

        //判断openid是否为空,为空则表示登录失败,支出业务异常
        if(openid==null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //判断当前的用户是否为新用户

        User user=userMapper.getByOpenid(openid);

        //如果是新用户,自动注册
        if(user==null){
            user=User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }

        //返回这个用户对象
        return user;

    }

    //调用微信接口服务,获得当前微信用户的openid
    private String getOpenid(String code) {
        Map<String,String> map=new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code", code);
        map.put("grant_type","authorization_code");
        String json= HttpClientUtil.doGet(WX_LOGIN,map);


        JSONObject jsonObject= JSON.parseObject(json);
        String openid = jsonObject.getString("openid");
        return openid;
    }
}
